Series resonance test device? Wuhan UHV specializes in the production ofseries resonance, with a wide range of product selection and professional electrical testing. To find series resonance, choose Wuhan UHV.

The AC withstand voltage test of various large power transformers, power cables, steam turbines, hydro generators, and other capacitive equipment must be strictly conducted regularly in accordance with the test regulations. Under power frequency conditions, due to the large capacitance of the test object or high requirements for the test voltage, there are also high requirements for the power capacity of the test device. Traditional power frequency withstand voltage devices often have large individual volumes, heavy weights, are not easy to transport on site, and are not easy to combine arbitrarily, resulting in poor flexibility. At present, a better method is to use series resonance for voltage withstand testing.

Advantages of series resonant power supply in power system applications

1. The required power capacity is greatly reduced. Series resonant power supply generates high voltage and high current through resonance between resonant reactor and the tested capacitor. In the entire system, the power supply only needs to provide the active consumption part of the system. Therefore, the required power supply for the experiment is only 1/Q of the test capacity.

2. The weight and volume of the equipment are greatly reduced. In the series resonant power supply, not only is the bulky high-power voltage regulating device and ordinary high-power power frequency test transformer eliminated, but the resonant excitation power supply only requires 1/Q of the test capacity, greatly reducing the system weight and volume, generally 1/5-1/10 of ordinary test devices.

3. Improve the waveform of the output voltage. A resonant power supply is a resonant filtering circuit that can improve the waveform distortion of the output voltage, obtain a good sine waveform, and effectively prevent the accidental breakdown of the test sample by harmonic peaks.

4. Prevent large short-circuit currents from burning the fault point. In the series resonance state, when the weak point of the insulation of the test sample is broken down, the circuit immediately disengages and the loop current rapidly drops to 1/Q of the normal test current. However, when conducting voltage withstand tests in parallel resonance or test transformer mode, the breakdown current immediately increases by several tens of times. Compared with the short-circuit current, the breakdown current differs by hundreds of times. So, series resonance can effectively identify insulation weaknesses without the concern of large short-circuit currents burning the fault point.

5. There will be no overvoltage recovery. When the test sample breaks down, due to the loss of resonance conditions, the high voltage immediately disappears, the arc immediately extinguishes, and the process of re establishing the recovery voltage is long. It is easy to disconnect the power supply before reaching the flashover voltage again. This voltage recovery process is an intermittent oscillation process of energy accumulation, which is long and does not result in any recovery overvoltage.

Main characteristics of series resonance test device

1. The frequency modulation and power components use the most advanced high-quality components imported from Japan;        

2. Fully utilize the company's existing resources and independently develop, design, and produce all components of the equipment, including variable frequency power supply, excitation transformer, high-voltage reactor, capacitor compensator, and high-precision capacitor voltage divider;       

3. It has multiple functions including fully automatic, fully manual, and semi-automatic, and can be switched and used freely;       

4. Equipped with settings for test voltage, pressurization time, alarm current setting, frequency range, and starting voltage;        

5. Equipped with discharge protection function, in the event of video flashover or other reasons causing sudden loss of resonance in the resonant circuit, the variable frequency control power supply will immediately automatically and quickly cut off the output, and display the protection type and flashover voltage value;        

6. Measure and display relevant information such as output voltage, output frequency, pressurization time, and protection action type. The voltage will automatically drop to zero upon completion of the test;  

7. Large LCD full Chinese interface platform technology, full touch screen operation, data storage.

Due to years of focus on the research and production of series resonant devices, Wuhan UHV is the top choice for variable frequency series resonant devices in terms of technology, quality, and service!